Pore Shape
Pore Shape - Related Videos
10:31
Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores
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Cited by 24 •
2015
Because of the importance and extensive use of palladium, gold and cobalt metals in high-technology equipment, their recovery and recycling constitute an important industrial challenge. The metal recovery system described herein is a simple, low-cost means for the effective detection, removal, and recovery of these metals from the urban mine.
03:37
Molecular Shape and Polarity
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2020
Dipole Moment of a Molecule Polar covalent bonds connect two atoms with differing electronegativities, leaving one atom with a partial positive charge (δ+) and the other atom with a partial negative charge (δ–), as the electrons are pulled toward the more electronegative atom. This separation of charge gives rise to a bond dipole moment. The magnitude of a bond dipole moment is represented by the Greek letter mu (µ) and is given by the formula shown here, where Q is the magnitude of the...
09:03
Morphometric Analyses of Shape: The Analysis Software Toolbox for Craniofacial Shape Quantification in Zebrafish
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2026
This work describes a protocol for quantifying craniofacial cartilage shape using free software (tpsDigs2, MorphoJ, and PAST) to measure changes in facial structure in zebrafish larvae.
01:23
Pore Size Distribution
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2024
In concrete, the pore size distribution significantly influences the material's properties. Capillary pores, markedly larger than gel pores, form a vast network within partially hydrated cement paste, reducing the concrete's strength and increasing its permeability. This heightened permeability leads to a greater risk of damage from environmental factors like freeze-thaw cycles and chemical attacks, with the extent of vulnerability also being tied to the water-to-cement ratio. Adequate...
02:52
VSEPR Theory and the Basic Shapes
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2020
Overview of VSEPR Theory Valence shell electron-pair repulsion theory (VSEPR theory) enables us to predict the molecular structure, including approximate bond angles around a central atom, of a molecule from an examination of the number of bonds and lone electron pairs in its Lewis structure. The VSEPR model assumes that electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between these electron pairs by maximizing the distance between them.
FAQs
Pore shape affects transport by changing the resistance encountered as fluids or gases move through void spaces. Narrow pores and highly tortuous paths make movement more difficult, whereas interconnected channels provide more continuous routes. Engineers therefore adjust the geometry to control permeability and flow behavior in porous structures, especially when designing materials that must either restrict passage or promote efficient transport.
Curvature and surface profile alter how fluids, gases, heat, and mechanical stresses interact with a porous structure. Changes in these features can influence the available surface area, the routes followed through the material, and the way stresses are distributed around voids. Considering these effects helps engineers select geometries that support the intended combination of transport behavior, structural performance, and durability.
These properties must be optimized together because improving one can affect the others. More open or interconnected geometry may support transport, while a different arrangement may better preserve mechanical strength or reduce mass. Engineers evaluate the required performance and tailor the void structure accordingly, using pore geometry as a design variable rather than optimizing permeability, strength, surface area, or mass in isolation.
Engineers can modify pore geometry through material selection, processing, machining, or additive manufacturing. The appropriate approach depends on the required balance of transport, mechanical behavior, surface area, and mass. These methods allow the void structure to be designed for a particular function rather than treated as an incidental feature of the solid, supporting more deliberate control of component performance.
Pore geometry is important in filtration membranes, catalysts, heat exchangers, battery electrodes, lightweight components, and tissue-engineering scaffolds. In each case, the void structure supports a different performance goal, such as controlling passage, enabling transport, increasing relevant surface area, reducing mass, or influencing durability. Designers use geometric control to match the material architecture to the demands of the application.
The arrangement of voids affects both transport and the response of the surrounding solid to mechanical stresses. A geometry selected only for high permeability may not provide the desired structural behavior, while a structure designed with strength and durability in mind may change flow or heat movement. Engineering design therefore considers pore geometry as part of the overall performance and service-life strategy.